Biggles is a Python module for the creation of publication-quality 2D scientific plots. Its features include an elegant, high-level interface, a simple TeX interpreter, and postscript, png, gif, svg, and x11 output formats.

Boa Constructor is a cross-platform RAD GUI-building IDE. It offers visual frame creation and manipulation, an object inspector, a debugger, integrated help, and many views on the source, including inheritance hierarchies, object methods and properties, and HTML generated from documentation strings. It is written in Python and uses the wxPython toolkit which wraps wxWindows.

cgi_buffer is a group of libraries that may be used to improve performance of CGI scripts (and other content generation engines) in some circumstances by applying performance-enhancing HTTP mechanisms that are typically not supported by them. Currently, Perl, Python, and PHP4 are supported. The Python library may also be used as a wrapper around another CGI script.

GCache is a Python module that provides a generic
cache class useful for speeding up any application
where objects are referenced by keys. It uses
object metadata to optimize hit-rates and
freshness for fetches, and uses a "write-through"
mechanism for writes and deletes. It can use
"if-modified-since" fetches or rsync delta updates
to refresh stale cached objects. GSource classes
are provided for generating useful metadata from
common sources (os.stat calls and MIME headers). A
simple example urlCache is implemented that
supports HTTP 1.1 (rfc2616) cache-control and
expire headers to ensure freshness. Also included
is an rfc2616 package useful for parsing HTTP 1.1
headers, and a PCache package implementing a
persistant cache using a Python shelve.

getmail is intended as a simple, secure, and
reliable replacement for fetchmail. It retrieves
email (either all messages, or only unread
messages) from one or more POP3, SPDS, or IMAP4
servers (with or without SSL) for one or more
email accounts, and reliably delivers into
qmail-style Maildirs, mboxrd files, or through
external MDAs (command deliveries) specified on a
per-account basis. getmail also has excellent
support for domain (multidrop) mailboxes,
including delivering messages to different users
or destinations based on the envelope recipient
address.

gnome-python is a set of interfaces to gnome-libs. It also contains a copy of PyGTK, so you don't have to worry about gnome-python getting out of sync with your copy of PyGTK. The bindings cover almost all of the APIs in gnome-libs.

Libxml2 is the XML C library developed for the
Gnome project. The library code is portable (to
Linux, Unix, Windows, embedded systems, etc.) and
modular; most of the extensions can be compiled
out. Libxml2 implements a number of existing
standards related to markup languages, including
the XML standard, Namespaces in XML, XML Base,
Relax NG, RFC 2396, XPath, XPointer, HTML4,
XInclude, SGML Catalogs, and XML Catalogs. In most
cases, libxml tries to implement the
specifications in a relatively strict way. To some
extent, it provides support for the following
specifications, but doesn't claim to implement
them: DOM, FTP client, HTTP client, and SAX2.
Support for W3C XML Schemas is in progress. It
includes xmllint, a command line XML validator.

mxCrypto is an extension package that provides OO-style access to the cipher algorithms and hash functions included in OpenSSL/SSLeay, a very nifty cryptographic library originally written by Eric Young and now maintained by the OpenSSL team. Its main purpose is filling in the missing parts in Andrew Kuchling's pycrypt export package with high quality implementations. Due to the ITAR export restrictions on cryptographic software, Andrew's implementations are not legally downloadable from outside the US.

mxDateTime is a Python module designed to do complex date/time handling with Python. It includes new Python extensions objects for storing and working with date and time as well as date/time parsers, access to the NIST time services and many different conversion routines to other well-known date/time standards such as ISO, ARPA, COM dates, Unix ticks, JDN, MJD, TJD and others.